Hole Plugs End Caps Black Silicone Rubber Snap-on Grommet Bung Wire Cable Protect Bush Hollow O-rings Sealed Gasket 4.5mm-30mmmodname=ckeditorName: Silicone Rubber Snap-on GrommetMaterial: Silicone RubberColor: blackSize:complete specifications, please choose from the list. For example, 4.5mm(Hole2mm), suggests that A=4.5mm, E= 2mm hole. Ohter sizes, please discuss with the scale chart.Temperature: -40°C-250°CHardness: Shore 50Product performance: Silicone rubber is a delicate and elastic materials with good sealing type, hot temperature resistance, anti-aging, acid and alkali corrosion resistance.Package Included: 1/2/3/5/10pcs * According on your choice.Warm Tips:1. There might be 0-0.3mm error within the handbook measurement, please take it into consideration, thank you!2. The actual colour of the article might be slightly varied from the photographs due to the digital camera and light effect.